Dust catcher air filter



Patented Aug. 23, 1932 UNITED STATES PATENT OFFICE GEORGE B. GALVIN, OFLOUISVILLE, KENTUCKY, ASSIGNOR TO GALVIN BROS. STEEL WOOL ANDMANUFACTURING COMPANY, F LOUISVILLE, KENTUCKY, A CORPORA j TION 0FKENTUCKY DUST carcnnn. In FILTER Application. led October 31, 1828-.Serial No. 316,257.

This invention relate'sto air filters or, as I preferably call them,dust catchers.

It is well understood that hot air heating systems, in which air isheated `and then led through conduits to desired points, have theinherent objection that any dust drawn into the system tends to passoutwith the heated air into the room or compartment it is desired to heat.v

The principal object of the present invention is to provide a novel andhighly eiiicient form of dust catcher which may be inserted in a hot airconduit, preferably adjacent the delivery end (register openingy andwhich,

when so inserted, will catch the dust tending to pass out with the airand yet permit the air to pass out substantially without retardation.

A second important object of the invention u is to provide a novel dustcatcher employing metallic wool such as steel wool for catching thedust.

With the above and other objects in view as will be hereinafterapparent, the invention consists in general of certain novel details ofconstru tion and combinations of parts hereinafter lly described,illustrated in the accompanying drawingand speciii cally claimed. l

D In the accompanying drawing like characters of reference indicate likeparts in the several views, and: l

. Figure 1 is a face view of al hot air register with the device inposition.

5 Figure 2 is a rear or back view of the lferred form ofthe device.

Figure 3 is a section on the line 3-3 of Fi re 2.

igure 4 is a detail section, partly broken 0 away, showing part of theframe construction only, the sectionfbeing taken on the line 4.-4 ofFigure 2.

Figure 5 is a face view of a modified-form of the device.

In the rst form of the invention, shown pre- 1 in Figures 1 to 4inclusive, there is provided a frame of rectangular shape and preferablyof round wire. Around two of the opposite side members of this frame ismounted a batt or thin sheet or ribbon of steel wool 11, the thin sheetbeing carried around as many times as may be desired and, as shown mFigure 3, there may be two or more'layers.

A brace and securing member 12 is provided ends 14 from coming loosealthouglh, owing v to the nature of the steel wool, t ese ends wouldnaturally interlock with the other portions of the batt. X Thisstructure thus formed isset into the opening or conduit Where it entersthe room or compartment, the end being usually provided withta frame 15as shown in Figure 1 which illustrates the appearance of the device inposition.

' In the form shown in Figure 5 a central 'block or support 16 has abatt or ribbon of metallic wool wound around it as at 17 t0 form astructure which may be itted into the conduit.

While steel wool is found to be especially adapted-for this purpose itis to be understood that I may use other metallic wool' and it will benoted that the steel wool in the thinl batt or ribbon offers little orno obstruction to the How of air yet, owing to its highly irregularinterstices, the flow of air is similarly irregular and consequently thesteel wool "catches the dust while allowing the air to How freelytherethrough.

Itwill be noted that in the form shown in .Figure 5 the usual frame,here indicated at 18 lis provided around the wall, this frame having theblock 16 connected thereto by the wires 19.

It is to be understood that the batt herein referred to is made byarranging nietal Wool in'theoform of a ribbon just as cotton or othermaterial is formed into a. batt.

This wool may, if desired, be made rust and corrosion proof by immersionin or spraying with japan lacquer or paint in such manner as to leave athin lm of the coating material on the wool.

There has thus been provided a simple and efficient device of the kinddescribed and for the purpose specified.

.It is obvious that minor changes may be made in the form andconstruction of the invention without departing from the material spiritthereof. It is not, therefore, desired to confine the invention to theexact form herein shown and described, butit is desired to include allsuch as properly come within the scope claimed.

Having thus described the invention, what is claimed as new is:

1. In a dust catcher for the conduit outlets of hot air heating systems,a frame adapted to 'ht the conduit, a batt of metallic wool wrap'-`wound around said frame, and means for holding the free ends thereof infrom unwrapping.

7 A dust filter comprising a holder, a strip place and of metal fibreswrapped about said holder,

andmeans engaging the free ends of the strip to prevent unwrapping ofthe strip.

8.V In a ltering device for a dust laden luidal stream, a holder adaptedto iit within a conduit, and a batt of metal fibres wound upon itself aplurality of times around said holder, the ends of the fibres at theexposed extremity of the batt being interlocked with lghefibres of thecontiguous portion of said att.

In testimony. whereof I aiix my signature.

t GEORGE B. GALVIN.

around that side and the opposite side to cover the space between theremaining sides of the frame, and across bar extending between oppositesides of the frame transverse the batt and' engaging over the battadjacent' the outer end of said bat-t to hold the end from unwrappin ,3.In altering device for a dust laden fluidal stream, a holder adapted totit a con duit of the stream, and a batt of metalbres wound around'saidholder, said batt having the free` ends thereof interlaced with thebresl of the batt. 4. In a filtering device for a dust laden iuidalstream, a frame adapted to lit a conduit of the stream, a battl of metalfibres `stretched across said frame, the ee ends of said batt beingfolded over said frame and brought together, and means for holding saidends together.

5. In a filtering device for a dust laden fluida] stream, a Jframeadapted toft a conduit of the stream, a batt of metal libres assing overand around the opposite sides o said frame, the -free .ends of said battbeing brought together, anda cross member for holding said endstogether.

6. In a filtering device for a dust laden uidal stream, a frameadapted'to t a conduit of the stream, a batt of metal libres ouv

